Do you have RAID enabled in the BIOS?
Have you attempted to install the RAID driver files manually per the link @Krotti83 posted?
In Windows Device Manager, Storage controllers, you should have AMD-RAID devices. Are any devices showing up with exclamation marks?
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT